Marine Renewable Energy Integrated Utilization System

Abstract

This invention relates to the field of renewable energy power generation technology, specifically disclosing a comprehensive offshore renewable energy utilization system, including a platform, a seawater desalination unit, a salinity gradient power generation unit, and an energy storage unit. The seawater desalination unit has a waste inlet, and the salinity gradient power generation unit includes a permeation tank, a permeation membrane, and a first hydro-generator. The permeation membrane divides the internal space of the permeation tank into a concentrated seawater chamber and a fresh seawater chamber. The permeation tank has a first inlet connected to the concentrated seawater chamber and the waste inlet, a first outlet connected to the concentrated seawater chamber and the inlet of the first hydro-generator, a second inlet, and a second outlet. Both the first hydro-generator and the energy storage unit are electrically connected to a microgrid. This invention combines a seawater salinity gradient power generation system with a seawater desalination system, using the waste from the seawater desalination system as the extractant and ordinary seawater as the feed liquid. It utilizes the principle of osmotic pressure to convert the chemical potential energy of water into the required electrical energy, reducing the cost of seawater desalination and improving economic efficiency.

Description

Technical Field

[0001] This invention relates to the field of renewable energy power generation technology, and in particular to a comprehensive offshore renewable energy utilization system. Background Technology

[0002] With the continuous development of the global economy, energy, as the cornerstone of economic development, has become increasingly important. However, traditional fossil fuels, such as oil, natural gas, and coal, are facing a crisis of depletion due to long-term over-exploitation and use. At the same time, the use of fossil fuels has also brought serious environmental problems, particularly exacerbating the global greenhouse effect and posing a huge threat to the Earth's ecological environment. Therefore, energy transition has become a crucial issue facing the world today. To address the dual challenges of fossil fuel depletion and environmental pollution, people have begun to actively seek and develop renewable energy sources, such as wind, solar, and ocean energy, which have advantages such as being clean, environmentally friendly, and sustainable, and are considered ideal alternatives to fossil fuels.

[0003] In the development and utilization of renewable energy, offshore platforms, as a novel development model, possess enormous potential and advantages. The sea surface contains abundant renewable energy sources, including wind, solar, wave, and tidal energy, with vast reserves and unlimited development potential. Therefore, establishing a comprehensive offshore renewable energy utilization system is of great significance for improving the utilization rate of renewable energy, promoting energy transition, and driving sustainable economic development.

[0004] However, the development and utilization of offshore renewable energy is still in its early stages, facing numerous technical challenges. Improving the efficiency of renewable energy utilization, reducing development costs, and enhancing the economic viability of the system are critical issues that urgently need to be addressed. Therefore, conducting research on integrated offshore renewable energy utilization systems is of great practical significance for promoting energy transition and achieving sustainable development goals. Summary of the Invention

[0005] This invention aims to at least partially address one of the technical problems in related technologies. To this end, embodiments of this invention propose a comprehensive offshore renewable energy utilization system.

[0006] The marine renewable energy integrated utilization system of this invention includes a platform, a seawater desalination device, a salinity gradient power generation device, and an energy storage device. The seawater desalination device is connected to the platform and has a waste outlet for discharging concentrated seawater. The salinity gradient power generation device includes a permeation tank, a permeation membrane, and a first hydroelectric generator. The permeation membrane is connected inside the permeation tank and divides the internal space of the permeation tank into a concentrated seawater chamber and a fresh seawater chamber. The permeation tank has a first inlet, a first outlet, a second inlet, and a second outlet. The first inlet and the first outlet are both connected to the concentrated seawater chamber. The first inlet is connected to the waste outlet. The first outlet is connected to the inlet of the first hydroelectric generator. The second inlet and the second outlet are both connected to the fresh seawater chamber. The second inlet is used to introduce seawater into the fresh seawater chamber. The first hydroelectric generator is electrically connected to a microgrid, and the energy storage device is electrically connected to the microgrid.

[0007] The marine renewable energy integrated utilization system of this invention combines a seawater salinity gradient power generation system with a seawater desalination system. It uses the effluent (concentrated seawater) from the seawater desalination system as the extractant and ordinary seawater as the feed liquid. By utilizing the principle of osmotic pressure, the chemical potential energy of water is converted into the required electrical energy, reducing the cost of seawater desalination and improving the overall economic performance of the system.

[0008] In some embodiments, the seawater desalination apparatus further includes a container connected to the platform, and the seawater desalination apparatus is located inside the container.

[0009] In some embodiments, the marine renewable energy integrated utilization system further includes a solar photovoltaic power generation device, which includes a photovoltaic cell, a chopper, a first inverter, and a first controller. There are multiple photovoltaic cells, and multiple photovoltaic cell arrays are arranged on the container. The photovoltaic cells, the chopper, the first inverter, and the microgrid are sequentially electrically connected, and the first controller is electrically connected to the first inverter.

[0010] In some embodiments, the marine renewable energy integrated utilization system further includes a wind power generation device, which includes a wind turbine, a rectifier, a second inverter, and a second controller. The wind turbine, the rectifier, the second inverter, and the microgrid are sequentially electrically connected, and the second controller is electrically connected to the second inverter.

[0011] In some embodiments, the marine renewable energy integrated utilization system further includes a tidal power generation device, which includes a second hydro-turbine generator, a rectifier assembly, and a third inverter, wherein the second hydro-turbine generator, the rectifier assembly, the third inverter, and the microgrid are sequentially electrically connected.

[0012] In some embodiments, the wind power generation device and the tidal power generation device are diagonally symmetrical on the platform.

[0013] In some embodiments, the salinity gradient power generation device further includes a pressure exchanger having a third inlet and a third outlet, wherein the waste outlet, the third inlet, the third outlet and the first inlet are sequentially connected.

[0014] In some embodiments, the platform includes an upper deck, a lower frame, multiple wall panels, and multiple partitions. The upper deck, the lower frame, and the multiple wall panels constitute a box-type floating platform. The multiple partitions are all connected within the platform to separate the components within the platform.

[0015] In some embodiments, the upper deck, the lower frame, the wall panel, and the partition are all steel-concrete composite panels, and the steel-concrete composite panels are connected to the internal concrete using studs.

[0016] In some embodiments, the seawater desalination device and the infiltration tank are symmetrical about the left and right sides of the platform, and the first hydro-generator and the energy storage device are symmetrical about the front and back sides of the platform. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a marine renewable energy integrated utilization system according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of a salinity gradient energy generation device according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of a solar photovoltaic power generation device according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of a wind power generation device according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of a tidal energy generation device according to an embodiment of the present invention.

[0022] Figure label:

[0023] Platform 1, Seawater desalination unit 2, Waste outlet 21, Container 22, Salinity gradient power generation unit 3, Permeation tank 31, 311, Concentrated seawater chamber 311, Desalinated seawater chamber 312, First feed inlet 313, First discharge outlet 314, Second feed inlet 315, Second discharge outlet 316, Permeation membrane 32, First hydro-generator 33, Pressure exchanger 34, Microgrid 4, Energy storage unit 5, Solar photovoltaic power generation unit 6, Photovoltaic cell 61, Chopper 62, First inverter 63, First controller 64, Wind power generation unit 7, Wind turbine 71, Rectifier 72, Second inverter 73, Second controller 74, Tidal power generation unit 8, 81, Second hydro-generator 81, 82, Rectifier assembly 82, Third inverter 83. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The following is in conjunction with the appendix Figure 1-5 This invention describes a marine renewable energy integrated utilization system according to an embodiment of the present invention.

[0026] like Figure 1 and Figure 2 As shown, the marine renewable energy integrated utilization system of this invention includes a platform 1, a seawater desalination unit 2, a salinity gradient power generation unit 3, and an energy storage unit 5. Wherein:

[0027] Platform 1 serves as the supporting structure for the entire system, providing support for the seawater desalination unit 2, the salinity gradient power generation unit 3, and the energy storage unit 5. The seawater desalination unit 2 is connected to platform 1 and has a waste outlet 21 for discharging concentrated seawater. The seawater desalination unit 2 is used to convert seawater into fresh water to provide fresh water and discharge concentrated seawater through the waste outlet 21.

[0028] The salinity gradient power generation device 3 includes a permeation tank 31, a permeation membrane 32, and a first hydro-generator 33. The permeation membrane 32 is connected to the permeation tank 31 and divides the internal space of the permeation tank 31 into a concentrated seawater chamber 311 and a desalinated seawater chamber 312. The permeation tank 31 has a first inlet 313, a first outlet 314, a second inlet 315, and a second outlet 316. The first inlet 313 and the first outlet 314 are both connected to the concentrated seawater chamber 311. The first inlet 313 is connected to the waste outlet 21 and is used to introduce the concentrated seawater generated by the seawater desalination device 2 into the concentrated seawater chamber 311. The first outlet 315 is connected to the first... The inlet of a water turbine generator 33 is connected to the water turbine generator to introduce liquid from the concentrated seawater chamber 311 into the water turbine generator to drive the turbine generator blades to rotate. The second inlet 315 and the second outlet 316 are both connected to the fresh seawater chamber 312. The second inlet 315 is used to introduce seawater into the fresh seawater chamber 312, and the second outlet 316 is used to discharge excess liquid from the fresh seawater chamber 312. The first water turbine generator 33 is electrically connected to the microgrid 4 so that the electrical energy generated by the first water turbine generator 33 can be transmitted and distributed through the microgrid 4. The energy storage device 5 is electrically connected to the microgrid 4 to store excess electrical energy.

[0029] It should be noted that when this system is in use, seawater is directly extracted from the sea and enters the freshwater chamber 312. The seawater desalination device 2 discharges concentrated seawater into the concentrated seawater chamber 311 through the waste outlet 21. Since a permeation membrane 32 is provided between the concentrated seawater chamber 311 and the freshwater chamber 312, the liquid in the concentrated seawater chamber 311 and the freshwater chamber 312 flows through the permeation membrane 32 to the concentrated seawater chamber 311 due to the concentration difference between the concentrated and fresh seawater. This increases the liquid volume on the concentrated seawater side. The liquid then flows through the water pipe to flush the blades of the first water turbine generator 33, thereby driving the first water turbine generator 33 to generate electricity. The mixed seawater can be directly discharged into the sea without affecting the marine ecological environment.

[0030] The marine renewable energy integrated utilization system of this invention combines a seawater salinity gradient power generation system with a seawater desalination system. Using the effluent (concentrated seawater) from the desalination system as the extractant and ordinary seawater as the feedstock, the chemical potential energy of water is converted into the required electrical energy using the principle of osmotic pressure, reducing the cost of seawater desalination and improving the overall economic performance of the system.

[0031] like Figure 1 As shown, in some embodiments, the seawater desalination device 2 also includes a container 22, which is connected to the platform 1. The seawater desalination device 2 is located inside the container 22, which is specifically designed to house and protect the seawater desalination device 2.

[0032] Therefore, the marine renewable energy integrated utilization system of this embodiment of the invention, through the setting of container 22, not only ensures the stable operation of seawater desalination device 2 under harsh sea conditions, but also facilitates its maintenance and repair.

[0033] like Figure 1 and Figure 3 As shown, in some embodiments, the marine renewable energy integrated utilization system also includes a solar photovoltaic power generation device 6. The solar photovoltaic power generation device 6 includes photovoltaic cells 61, a chopper 62, a first inverter 63, and a first controller 64. There are multiple photovoltaic cells 61, and the array of multiple photovoltaic cells 61 is arranged on the top of the container 22 or other suitable locations to maximize solar energy capture. The photovoltaic cells 61, the chopper 62, the first inverter 63, and the microgrid 4 are sequentially electrically connected so that the DC power generated by the photovoltaic cells 61 is first regulated by the chopper 62 to ensure the stability of the power input. The regulated power is then sent to the first inverter 63 to be converted into AC power to meet the power demand of the microgrid 4. The first controller 64 is electrically connected to the first inverter 63 to monitor the operating status of the entire photovoltaic power generation system, including key parameters such as battery power output, voltage, and current, to ensure the safe and efficient operation of the system.

[0034] Therefore, the marine renewable energy integrated utilization system of this embodiment improves the energy self-sufficiency of the entire system and improves the comprehensive energy utilization efficiency by setting up the solar photovoltaic power generation device 6.

[0035] like Figure 1 and Figure 4 As shown, in some embodiments, the marine renewable energy integrated utilization system also includes a wind power generation device 7. The wind power generation device 7 includes a wind turbine 71, a rectifier 72, a second inverter 73, and a second controller 74. The wind turbine 71, rectifier 72, second inverter 73, and microgrid 4 are sequentially electrically connected so that the unstable AC power generated by the wind turbine 71 is converted into DC power with a stable voltage within a certain range by the rectifier 72 to ensure the stability of the power input. The regulated power is then sent to the second inverter 73 to be converted into AC power to meet the power demand of the microgrid 4. The second controller 74 is electrically connected to the second inverter 73 to monitor and control the operating status of the wind power generation system in real time. The second controller 74 can monitor key parameters such as the speed, power output, voltage, and current of the wind turbine 71, and adjust the operating status of the inverter according to these parameters to ensure the safe and efficient operation of the wind power generation system. The second controller 74 can also adjust the blade angle and speed of the wind turbine 71 according to changes in wind speed and wind direction to maximize the capture of wind energy.

[0036] Therefore, the marine renewable energy integrated utilization system of this embodiment of the invention improves the energy self-sufficiency of the entire system and improves the comprehensive utilization efficiency of energy by setting up the wind power generation device 7.

[0037] like Figure 1 and Figure 5 As shown, in some embodiments, the marine renewable energy integrated utilization system also includes a tidal power generation device 8, which includes a second hydro-generator 81, a rectifier assembly 82, and a third inverter 83. The second hydro-generator 81, the rectifier assembly 82, the third inverter 83, and the microgrid 4 are sequentially electrically connected to convert the AC power generated by the second hydro-generator 81 into DC power with a stable voltage within a certain range to ensure the stability of the power input. The regulated power is then sent to the third inverter 83 to be converted into AC power to meet the power demand of the microgrid 4.

[0038] Therefore, the marine renewable energy integrated utilization system of this embodiment improves the energy self-sufficiency of the entire system and improves the comprehensive energy utilization efficiency by setting up the tidal power generation device 8.

[0039] like Figure 1 As shown, the wind power generation device 7 and the tidal power generation device 8 are diagonally symmetrical on the platform 1. Since the wind power generation device 7 and the tidal power generation device 8 are installed on the diagonal of the platform 1, they form a symmetrical layout, which helps to ensure that the wind power generation device 7 can capture wind energy to the maximum extent, while avoiding mutual interference with the tidal power generation device 8, and can also achieve the balance and stability of the platform 1.

[0040] like Figure 2 As shown, in some embodiments, the salinity gradient power generation device 3 further includes a pressure exchanger 34, which has a third inlet and a third outlet, and the waste outlet 21, the third inlet, the third outlet and the first inlet 313 are connected in sequence.

[0041] It should be noted that after the concentrated seawater undergoes pretreatment, it enters the pressure exchanger 34. At this stage, the pressure exchanger 34 will adjust the pressure of the concentrated seawater appropriately to ensure the smooth progress of subsequent filtration and treatment steps. Furthermore, by adjusting the pressure of the seawater, salinity gradient energy can be utilized more effectively, thereby improving the efficiency and stability of the entire power generation process.

[0042] like Figure 1 As shown, in some embodiments, platform 1 includes an upper deck, a lower frame, multiple wall panels, and multiple partitions (not shown). The upper deck, lower frame, and multiple wall panels constitute a box-type floating platform 1. Multiple partitions are connected within platform 1 to separate the components within platform 1, thereby reducing the mutual influence between the components.

[0043] Furthermore, the upper deck, lower frame deck, wall panels, and partitions are all steel-concrete composite panels, and the steel panels are connected to the internal concrete using studs.

[0044] Therefore, the platform 1 structure of the marine renewable energy integrated utilization system of this embodiment adopts a steel-concrete composite box-type floating platform 1 structure, which combines the toughness of steel and the compressive strength of concrete, thereby achieving excellent stability and load-bearing capacity. This not only improves the stability and load-bearing capacity of platform 1, but also reduces the manufacturing and maintenance costs of platform 1. At the same time, this structural form also has good durability and corrosion resistance, and can operate stably for a long time in harsh marine environments.

[0045] In some embodiments, the seawater desalination device 2 and the infiltration tank 31 are symmetrical about left and right on the platform 1, and the first hydro-generator 33 and the energy storage device 5 are symmetrical about front and back on the platform 1, thereby forming a symmetrical layout that helps to reduce mutual interference between components and the balance and stability of the platform 1.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A comprehensive marine renewable energy utilization system, characterized in that, include: A platform and a seawater desalination device, wherein the seawater desalination device is connected to the platform and has a waste outlet for discharging concentrated seawater; A salinity gradient energy generation device includes a permeation tank, a permeation membrane, and a first hydro-generator. The permeation membrane is connected to the permeation tank and divides the internal space of the permeation tank into a concentrated seawater chamber and a fresh seawater chamber. The permeation tank has a first inlet, a first outlet, a second inlet, and a second outlet. The first inlet and the first outlet are both connected to the concentrated seawater chamber. The first inlet is connected to the waste outlet. The first outlet is connected to the inlet of the first hydro-generator. The second inlet and the second outlet are both connected to the fresh seawater chamber. The second inlet is used to introduce seawater into the fresh seawater chamber. The first hydro-generator is electrically connected to a microgrid. An energy storage device, which is electrically connected to the microgrid.

2. The marine renewable energy integrated utilization system according to claim 1, characterized in that, The seawater desalination unit also includes a container connected to the platform, and the seawater desalination unit is located inside the container.

3. The marine renewable energy integrated utilization system according to claim 2, characterized in that, It also includes a solar photovoltaic power generation device, which includes a photovoltaic cell, a chopper, a first inverter and a first controller. There are multiple photovoltaic cells, and multiple photovoltaic cell arrays are arranged on the container. The photovoltaic cells, the chopper, the first inverter and the microgrid are sequentially electrically connected. The first controller is electrically connected to the first inverter.

4. The marine renewable energy integrated utilization system according to claim 1, characterized in that, It also includes a wind power generation device, which includes a wind turbine, a rectifier, a second inverter, and a second controller. The wind turbine, the rectifier, the second inverter, and the microgrid are sequentially electrically connected, and the second controller is electrically connected to the second inverter.

5. The marine renewable energy integrated utilization system according to claim 4, characterized in that, It also includes a tidal power generation device, which includes a second hydro-generator, a rectifier assembly, and a third inverter, wherein the second hydro-generator, the rectifier assembly, the third inverter, and the microgrid are sequentially electrically connected.

6. The marine renewable energy integrated utilization system according to claim 5, characterized in that, The wind power generation device and the tidal power generation device are diagonally symmetrical on the platform.

7. The marine renewable energy integrated utilization system according to claim 1, characterized in that, The salinity gradient power generation device also includes a pressure exchanger, which has a third inlet and a third outlet, and the waste outlet, the third inlet, the third outlet and the first inlet are connected in sequence.

8. The marine renewable energy integrated utilization system according to claim 1, characterized in that, The platform includes an upper deck, a lower frame, multiple wall panels, and multiple partitions. The upper deck, the lower frame, and the multiple wall panels constitute a box-type floating platform. The multiple partitions are all connected within the platform to separate the components within the platform.

9. The marine renewable energy integrated utilization system according to claim 8, characterized in that, The upper deck, the lower frame, the wall panel, and the partition are all steel-concrete composite panels, and the steel plates are connected to the internal concrete using studs.

10. The marine renewable energy integrated utilization system according to claim 1, characterized in that, The seawater desalination device and the infiltration tank are symmetrical on the platform, and the first hydroelectric generator and the energy storage device are symmetrical on the platform.

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